The most difficult con­stel­la­tions riddles

Beta Cancri, also named Tarf is the brightest star in the zodiacal constellation of Cancer. It has an apparent visual magnitude of +3.5 and an absolute magnitude of −1.2. Based on parallax measurements obtained during the Hipparcos mission, it is approximately 290 light-years distant from the Sun.

Spica is the brightest star in the constellation of Virgo and the 16th brightest star in the night sky. Analysis of its parallax shows that it is located 250 ± 10 light years from the Sun. Spica, along with Denebola or Regulus depending on the source and Arcturus, is part of the Spring Triangle asterism, and by extension.

Southern Cross or simply Crux is a constellation visible only on the southern hemisphere of Earth. There is a number of countries that placed it on their national flags: New Zealand, Papua-New Guinea, Samoa, Australia and Brasil.